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Ni-Cr合金釬料激光釬焊金剛石磨粒界面顯微結(jié)構(gòu)及形成機(jī)理
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河南理工大學(xué) 河南 焦作 454000,河南理工大學(xué) 河南 焦作 454000,河南理工大學(xué) 河南 焦作 454000,河南理工大學(xué) 河南 焦作 454000

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


The interface microstructure and formation mechanism of diamond abrasives laser brazed with Ni-Cr solders
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Henan Polytechnic University,Henan Polytechnic University,Henan Polytechnic University,Henan Polytechnic University

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National Natural Science Foundation of China (51364025)

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    摘要:

    本文采用Ni-Cr合金釬料,在Ar氣保護(hù)條件下,對(duì)金剛石磨粒進(jìn)行了激光釬焊試驗(yàn)研究。采用掃描電鏡(SEM)和能譜儀(EDS)及X射線衍射儀(XRD)分析金剛石磨粒與Ni-Cr釬料結(jié)合界面的組織結(jié)構(gòu)與物相組成,并研究了釬料與金剛石界面處碳化物的形成機(jī)理。測(cè)試結(jié)果表明,激光釬焊過程中在金剛石表面附近形成的富Cr層與金剛石表面的C元素反應(yīng)生成碳化物Cr3C2,通過反應(yīng)熱力學(xué)與動(dòng)力學(xué)分析顯示界面反應(yīng)產(chǎn)物可以依靠置換反應(yīng)形成,使金剛石磨粒與釬料實(shí)現(xiàn)了牢固結(jié)合。

    Abstract:

    In this paper, the laser brazing of diamond abrasives using Ni-based solders in an Ar atmosphere was investigated. The microstructure and phase composition of interfaces between diamond abrasives and Ni-based solders were analyzed using scanning electronic microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). Meanwhile, the formation mechanism of carbides at interfaces between solders and diamond abrasives was discussed. The results indicate that during laser brazing, the Cr-enriched layer around the diamond surface reacts with the C in the diamond surface and consequently forms Cr3C2. Based on reaction thermodynamics and kinetics analysis, it is revealed that the interface reaction products can be formed via replacement reactions, which realizes the tight combination between diamond abrasives and solders.

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引用本文

楊志波,劉愛菊,劉石安,楊瑞云. Ni-Cr合金釬料激光釬焊金剛石磨粒界面顯微結(jié)構(gòu)及形成機(jī)理[J].稀有金屬材料與工程,2016,45(5):1152~1156.[Zhibo Yang, Aiju Liu, Shian Liu, Ruiyun Yang. The interface microstructure and formation mechanism of diamond abrasives laser brazed with Ni-Cr solders[J]. Rare Metal Materials and Engineering,2016,45(5):1152~1156.]
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歷史
  • 收稿日期:2015-04-14
  • 最后修改日期:2015-10-21
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2016-06-02
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